GPT-5.5 vs Kimi K2.6 — Who Actually Wins? Real Benchmark Data (2026)

head to head

GPT-5.5 vs Kimi K2.6

10 shared benchmarks

9

wins

1

ties

0

wins

84.4%

BrowseComp

83.2%

84.1%

CharXiv

80.4%

93.5%

GPQA Diamond

90.5%

41.4%

Humanity's Last Exam

34.7%

81.2%

MMMU Pro

79.4%

78.7%

OSWorld

73.1%

49.5%

OSWorld 2.0

22.1%

58.6%

SWE-bench Pro

58.6%

82.7%

Terminal-Bench 2.0

66.7%

83.4%

Terminal-Bench 2.1

71.3%